Selectively-operated system.



R. N. HILL.

SELECTlVEL-Y mam!) SYSTEM. APPLICATION FILED MAR-21,1914.

Patented Apr. 3, 1917. H9

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' ratus and connections of a system emb UNITED STATES PATENT OFFICE.

BALPH N. HILL, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, TO WESTERN ELECTRIC COMPANY. INCORPORATED, A CORPORATION OF NEW YORK.

SELECTIVELY-OPERATED SYSTEM.

specification of Letters Patent.

Patented Apr. 3, 191'7.

Application flled March 21, 1914. Serial No. 826,366.

To all whom it may concern:

Be it known that I, RALPH NADING HILL, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented a certain new. and useful Improvement in Selectively- Operated Systems, of which the following is a full, clear, concise, and exact description.

This invention relates to the control of high tension transmission systems and other power circuits and has for its object the provision of means whereby the circuit at any particular location along a transmission line maybe interrupted from amain or despatching station without interfering with other portions of the line.

In accordance with this invention there is located at each of the power or feeder stations a selectively operated circuit closing device controlled from a central or despatching station and adapted in its operation to cause the operation of a circuit breaker to disrupt the circuit through the feeders of a particular station.

The drawing is a diagram of the appao ying this invention.

In the drawing, 1 and 2 designate line wires with which are connected a sending or despatching station A, and a plurality of ower or feeder stations B and C. Located at the despatching station A is an impulse transmitter 5 controlling contact 6 which, when closed in the operation of the transmitter, closes the circuit of an impulse relay 8 by way of battery 7, coil of relay 8, contact 6 and back to battery. The energization of relay 8 closes its contacts 9 and 10 which feed battery 11 out over line wires 1 and 2. The transmitter 5 is provided with teeth formed on the periphery thereof, adapted to produce short and long impulses when said transmitter is actuated. The movement of the transmitter 5 is in a clockwise direction and it makes one complete revolution by means of a clockwork mechanism each time said transmitter is actuated. There is a sepprovided for each of the selectors located at the various power stations B and C. These transmitters are connected in multiple as shown on the drawing.

arate transmitter Located at each of the power stations B and G is a selector comprising quick and slow acting magnets 16 and 17 designated as stepping and holding magnets, and holding and stepping pawls 18 and 19 controlled by said magnets 17 and 16 respectively to advance a ratchet wheel 31. The ratchet wheel 31 carries a contact arm 33 which, in the movement of said ratchet wheel, is brought into engagement with contact 22 to complete a circuit of a local signal 23 and an electromagnet 24 located at the power station. The

stepping and holding magnets 16 and 17 are connected in series with each other and in bridge of the line wires 1 and 2. Included in the bridge with the stepping and holding magnets are retardation coils 20 and 21 and a variable resistance 32, the retardation coils being for the purpose of protecting the selector against lightning discharges and to reduce the shunting effect of the selector to talking currents on the line wires 1 and 2, and a variable resistance being provided for tapering the line resistance. Upon the energization of electromagnet 24, its front contacts 25 and 26 are closed, thus completing a circuit direct from power bus-bars 40 and 41 through magnet 27. The electromagnet 24 is made slow acting in any well known manner so as to prevent the circuit breaker 28 from being unintentionally tripped by a passing contact of arm 33 with spring 22 upon the actuation of one of the transmitters 5. The arms 33 of the several selectors are so positioned with respect to the ratchet wheels 31 that for a given number of trans mitted impulses arm 33 of only one selector will have contact actuation of any transmitter 5, therefore, will cause the arm 33 of the corresponding selector to have contact with its spring 22 long enough to energize the slow-acting magnet 24.

The power bus-bars 40 and 41 receive current from a power generator 45 or any other suitable source of electrical energy. Magnet 27 consists of a solenoid which, when energized, actuates pawl 42, causing the circuit breaker28 to be tripped. The tripping of circuit breaker 28 removes current from the feeder leads 29 and 30. A condenser 43 prevents the flow of battery current oyer conductor 34 during the operation of the selector.

The despatching station A and the power stations Band C are provided with telephonic apparatus 15 for the purpose of communication between stations.

Referring now to the operation of the system, it will be assumed that an attendant ati 11.- This causes both the stepping and holding magnets 16 and 17 to be energized simultaneously. The succeeding impulses are of shorter duration, and as magnet 17 is slow releasing and magnet 16 quick acting, the

holding pawl 18 prevents the release of ratchet wheel 31 while being advanced by the stepping pawl 19.. When the ratchet wheel 31 has rotated a sufiicient distance, arm 33 contacts with spring 22. Simultaneously with the contacting of members 22 and 33, the long impulse tooth 0 the impulse transmitter 5 keeps contac 6 closed for an extended period, which is consid-' erably longer than the time required to transmit the previous impulses. Thismeans supplies battery current for the operation of electromagnet 24, which is slow in respond-- ing, and for the signal 23. The circuit is now closed from battery 11, conductor 13,

contact 10, lead wires-2, 42,. arm 33, contact spring 22, conductor 36,'e lectromagnet 24,

conductors 37,- 35, 1, contact 9, conductor 12,

backto battery. This energizes the electromagnet 24;, closingits front contacts 25 and 26., thuscompleting a circuit-through the magnet 27, 'which operates the circuit' breaker 28. H

The operation of terrupts the current over feeder leads 29 and 30, which feeder leads supply current to the sections of thepower line i6, 47. The cur} rent having been interrupted, anythingbe ring' operated by means of it will consequently be stopped. At-thesame time that 1 magnetv 24'.v is energized, magnets 4 4"of signal 23 are energized by' a, current flowing through the following path: battery 11,con ductor 13, contact 10, lead. wires 2, 42, arm

33, contact spring22, conductor 36, contact 39, magnetse, conductors 38, 35, 1, ;con-- tact 9, conductor 12, back-to -battery.

sounds an alarm and attracts the attendants notice.. The I signal will continue. topper-ate until the long impulsetooth on the transcircuit" breaker 28 in'.

earnt? mitter'5 disengages the spring of cont-act 6,

thereby disconnecting battery 11 from the line. By means of the special signal 23, the

attendant at station B will be'notifiedthat the circuit breaker 28 has been purposely tripped by the despatcher at the central station and he .will not attempt to restore it without being first instructed to do so by the chief despatcher over the telephones provided for this purpose.

It will be readily apparent that with this invention any portion of a transmission system may be readily controlled in case of danger, such as the breaking of high. tension feeder wires, the running wild of an electric train, or like emergencies.

What is claimed is:

1. In a selective switching system, a central station, a plurality of power stations for supplying power to difierent sections of a power circuit", a line circuit connecting the central station with the several power Sta-- tions, a circuit breaker individual to each power station for interrupting the section of the power circuit individual to that station, an energizing winding for said circuit breaker, a relay for connecting said winding andsaid section of the power circuit in parallel, a selectively operated device at each of said power stations, each independently operable over said line'from the central ofafice, a source ofcurrent at the central office for operating said selectively operated device and said relay, means for connecting said source of current to said selectively operated device, and means controlled by said selectively operated device to connect said source of current to said relay.

2. In a selective switching system, a central station, a plurality of power stations for supplying current to different sections of a power circuit, a line circuit connecting the central station with the several powerstations, a switching device for interruptingthe section of the power circuit individual to that station, electromagnetically actuated means for operating-said switch-' ing device, a selectively operated device at each of-said power stations each independentlyoperable over said line from the central ofiice, a source of current at the central office for operating said selectively operated device and said electromagnetically actuated means, means for connecting said sourcelllof current to said selectively o erated device,

and means controlled by sai selectively operated 'device to connect said source of current to said electromagnetically actuated means.

: 3,111 a selectiwe switching system, a switching device, electromagnetic meansnto cause the automatic operation of said switchnetlc means, a remote control station, a

ing device, a' remotely controlled step-by ste 'devicefor. controlling said electromagsource of current at said remote control stno In Witness whereof. I hereunto subscribe tlon for HCUIHUIIJ szud electronmg'netm my name [1115 19th da of March A. 1)., 10 means and sun] stcp-by-step deuce, means 1 14-. for connecting mid source of (run-mt to said Y RALPH N. HILL. stepby-stop (lCHVO. and means controlled 1 by said step-l v-stup device to connect said Vitnesses:

SOIHCO of current to sand electromngnetlc E. Roman,

means. y L. Domxo. 

